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Ceph is a distributed object, block, and file storage platform
b04b6f4823
The predirty_journal_parents() calls wrlock_start() with nowait=true because it has a journal entry open and we don't want to trigger a nested scatterlock change that needs to journal something again (either via scatter_writebehind or scatter_start). (MDLog can only handle a single log entry open at once because building multiple at once would require very very very careful ordering of predirty() calls and versions.) We were already check for the simple_lock() case (which may call writebehind); fix up the check to also cover the scatter_mix() (which may call scatter_start) case. Fixes this crash: mds/MDLog.h: In function 'void MDLog::start_entry(LogEvent*)': mds/MDLog.h:191: FAILED assert(cur_event == __null) ceph version 0.24~rc (commit:fe10300317383ec29948d7dbe3cb31b3aa277e3c) 1: (CInode::finish_scatter_update(ScatterLock*, CDir*, unsigned long, unsigned long)+0x804) [0x606e14] 2: (CInode::start_scatter(ScatterLock*)+0xaa) [0x60dc1a] 3: (Locker::scatter_mix(ScatterLock*, bool*)+0x1ca) [0x589a9a] 4: (Locker::wrlock_start(SimpleLock*, MDRequest*, bool)+0x165) [0x597d65] 5: (MDCache::predirty_journal_parents(Mutation*, EMetaBlob*, CInode*, CDir*, int, int, snapid_t)+0x153e) [0x55a70e] 6: (Locker::scatter_writebehind(ScatterLock*)+0x42d) [0x58553d] 7: (Locker::simple_lock(SimpleLock*, bool*)+0x7ab) [0x58beeb] 8: (Locker::scatter_nudge(ScatterLock*, Context*, bool)+0x3ad) [0x58c49d] 9: (Locker::scatter_tick()+0x28a) [0x58c98a] 10: (MDS::tick()+0x4e4) [0x4b26a4] 11: (SafeTimer::timer_thread()+0x22c) [0x6d164c] 12: (SafeTimerThread::entry()+0xd) [0x6d34bd] 13: (Thread::_entry_func(void*)+0xa) [0x4943da] 14: /lib/libpthread.so.0 [0x7fc87810b73a] 15: (clone()+0x6d) [0x7fc876dad69d] Signed-off-by: Sage Weil <sage@newdream.net> |
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| debian | ||
| fusetrace | ||
| man | ||
| qa | ||
| src | ||
| web | ||
| wireshark | ||
| .gitignore | ||
| AUTHORS | ||
| autogen.sh | ||
| builddebs.sh | ||
| ceph.spec.in | ||
| ChangeLog | ||
| configure.ac | ||
| COPYING | ||
| INSTALL | ||
| Makefile.am | ||
| NEWS | ||
| publish.sh | ||
| pull.sh | ||
| push.sh | ||
| README | ||
| RELEASE_CHECKLIST | ||
| release.sh | ||
| sign.sh | ||
| SubmittingPatches | ||
| update_pbuilder.sh | ||
Ceph - a scalable distributed file system
-----------------------------------------
Please see http://ceph.newdream.net/ for current info.
----
To build the server daemons, and FUSE client,
$ ./autogen.sh
$ ./configure
$ make
or
$ cd src
$ make
(Note that the FUSE client will only be built if libfuse is present.)
----
A quick summary of binaries that will be built in src/
daemons:
cmon -- monitor daemon. handles cluster state and configuration
information.
cosd -- storage daemon. stores objects on a given block device.
cmds -- metadata daemon. handles file system namespace.
ceph -- send management commands to the monitor cluster.
userland clients:
cfuse -- fuse client.
csyn -- synthetic workload generator client.
tools:
monmaptool -- create/edit mon map
osdmaptool -- create/edit osd map
crushtool -- create/edit crush map
scripts:
mkcephfs -- cluster mkfs tool
init-ceph -- init.d start/stop script